Photos: Tallinn's Toompea tänav partly closed after underground collapse
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One lane of traffic on Toompea tänav in Tallinn was temporarily closed Friday following the collapse of part of an adjacent underground fortification.
The Wismar Ravelin is a triangular defensive structure built in the late 17th century in the moat surrounding the fortress.
The underground fortification's vaulted arch and support pillar collapsed, causing the surrounding soil to give way next to Toompea tänav.
The city closed one lane of the street for geotechnical and structural studies and to plan further repair work, the Tallinn Urban Environment and Public Works Department announced on social media.
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Editor: Mari Peegel, Aili Vahtla
